Guinevere

Key Facts

• Categorized as a Outer Main-belt Asteroid
• Comparable in size to the city of Los Angeles (35.69 km diameter)
• Not a Near Earth Object
• Not a Potentially Hazardous Object
• See orbit simulation

Overview

Guinevere is a large asteroid that orbits between Mars and Jupiter in the outer reaches of the main asteroid belt. NASA JPL has not classified Guinevere as potentially hazardous because its orbit does not bring it close to Earth.

Guinevere orbits the sun every 2,880 days (7.89 years), coming as close as 2.87 AU and reaching as far as 5.07 AU from the sun. Guinevere is about 35.7 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the city of Los Angeles.

The rotation of Guinevere has been observed. It completes a rotation on its axis every 14.73 hours.

No Close Approaches

Guinevere's orbit is 1.88 AU from Earth's orbit at its closest point. This means that there is an extremely wide berth between this asteroid and Earth at all times.

Orbital simulations conducted by NASA JPL's CNEOS do not show any close approaches to Earth.

Images and Observations

Guinevere's orbit is determined by observations dating back to Aug. 19, 1928. It was last officially observed on July 4, 2023. The IAU Minor Planet Center records 2,751 observations used to determine its orbit.

Scientists have been able to determine this object's shape:

View asteroid Guinevere in 3D.

Accessibility and Exploration

This asteroid is not considered a viable target for human exploration by the NHATS study.

Similar Objects

These objects have orbits that share similar characteristics to the orbit of Guinevere:

• 153 Hilda (A875 VC)
• 361 Bononia (A893 EF)
• 1512 Oulu (1939 FE)

References

• JPL Small Body Database
• Mission Design
• Sky Finder Chart

Orbit Simulation

Sky Map

The position of Guinevere is indicated by a ◯ pink circle. Note that the object may not be in your current field of view. Use the controls below to adjust position, location, and time.